The iTechworld 20A Battery Charger has three key charging & maintenance stages to maximize the power and lifetime of the battery. The iTechworld 20A Battery Charger can be attached to the battery indefinitely if required without risk of over or under charging.

Sometimes we feel like a broken old record player when we talk about battery chargers. The best kind of charger to use on your battery is a 3 stage charger. Basically, these types of chargers are safe, easy to use, and will not overcharge your battery. That is why we only stock the iTechworld 20 Amp 3 Stage Battery Charger.

3 stage chargers work and they work well. But here's the million-dollar question: What are the 3 stages? What makes these chargers so different and efficient? Is it really worth it? Let’s find out by going through each stage, one by one.

Stage 1 | Bulk Charge

The primary purpose of a battery charger is to recharge a battery. This first stage is typically where the highest voltage and amperage the charger is rated for will actually be used. The level of charge that can be applied without overheating the battery is known as the battery's natural absorption rate. For a typical 12-volt AGM battery, the charging voltage going into a battery will reach 14.6-14.8 volts, while flooded batteries can be even higher. For the gel battery, the voltage should be no more than 14.2-14.3 volts. If the charger is a 10-amp charger, and if the battery resistance allows for it, the charger will put out a full 10 amps. This stage will recharge batteries that are severely drained. There is no risk of overcharging in this stage because the battery hasn't even reached full yet.

Stage 2 | Absorption Charge

Smart chargers will detect voltage and resistance from the battery prior to charging. After reading the battery the charger determines which stage to properly charge at. Once the battery has reached 80%* state of charge, the charger will enter the absorption stage. At this point most chargers will maintain a steady voltage, while the amperage declines. The lower current going into the battery safely brings up the charge on the battery without overheating it.

This stage takes more time. For instance, the last remaining 20% of the battery takes much longer when compared to the first 20% during the bulk stage. The current continuously declines until the battery almost reaches full capacity.

Stage 3 | Float Charge

Some chargers enter float mode as early as 85% state of charge but others begin closer to 95%. Either way, the float stage brings the battery all the way through and maintains the 100% state of charge. The voltage will taper down and maintain at a steady 13.2-13.4 volts, which is the maximum voltage a 12-volt battery can hold. The current will also decrease to a point where it's considered a trickle. That's where the term "trickle charger" comes from. It's essentially the float stage where there is charge going into the battery at all times, but only at a safe rate to ensure a full state of charge and nothing more. Most smart chargers do not turn off at this point, yet it is completely safe to leave a battery in float mode for months to even years at a time.

Knowing how many Amp hours your deep cycle battery stores allows you to work out what kind of charger you’ll need and approximately how long the charge will take. To calculate the charge time, find the Amp hour rating of your battery and divide it by the amp rating of the charger

Knowing how many Amp hours your deep cycle battery stores allows you to work out what kind of charger you’ll need and approximately how long the charge will take. To calculate the charge time, find the Amp hour rating of your battery and divide it by the amp rating of the charger. - See more at: http://www.aussiebatteries.com.au/blog/which-deep-cycle-battery-charger-do-i-need/#sthash.fOWlAcFA.dpuf

It's the healthiest thing for a battery to be at 100% state of charge.

We've said it before and we'll say it again. The best kind of charger to use on a battery is a 3 stage smart charger. They are easy to use and worry free. You don't ever have to worry about leaving the charger on the battery for too long. In fact, it's best if you DO leave it on. When a battery is not at a fully charged state, sulfate crystal build on the plates and this robs you of power. If you leave your powersports in the shed during off-season or for vacations, please connect the battery to a 3 stage charger. This will ensure that your battery will be ready to start whenever you are.

- See more at: https://www.batterystuff.com/blog/3-stages-of-smart-chargers.html#sthash.BFbRKmQN.dpuf

Stage 1 | Bulk Charge

The primary purpose of a battery charger is to recharge a battery. This first stage is typically where the highest voltage and amperage the charger is rated for will actually be used. The level of charge that can be applied without overheating the battery is known as the battery's natural absorption rate. For a typical 12 volt AGM battery, the charging voltage going into a battery will reach 14.6-14.8 volts, while flooded batteries can be even higher. For the gel battery, the voltage should be no more than 14.2-14.3 volts. If the charger is a 10 amp charger, and if the battery resistance allows for it, the charger will put out a full 10 amps. This stage will recharge batteries that are severely drained. There is no risk of overcharging in this stage because the battery hasn't even reached full yet.

- See more at: https://www.batterystuff.com/blog/3-stages-of-smart-chargers.html#sthash.BFbRKmQN.dpuf

We've said it, and we'll say it again. The best kind of charger to use on your battery is a 3 stage charger. They are also called "smart chargers" or "micro processor controlled chargers". Basically, these types of chargers are safe, easy to use, and will not overcharge your battery. Almost all of the chargers we sell are 3 stage chargers.

Okay, so it's hard to deny that 3 stage chargers work and they work well. But here's the million dollar question: What are the 3 stages? What makes these chargers so different and efficient? Is it really worth it? Lets find out by going through each stage, one by one.

- See more at: https://www.batterystuff.com/blog/3-stages-of-smart-chargers.html#sthash.BFbRKmQN.dpuf

We've said it, and we'll say it again. The best kind of charger to use on your battery is a 3 stage charger. They are also called "smart chargers" or "micro processor controlled chargers". Basically, these types of chargers are safe, easy to use, and will not overcharge your battery. Almost all of the chargers we sell are 3 stage chargers.

Okay, so it's hard to deny that 3 stage chargers work and they work well. But here's the million dollar question: What are the 3 stages? What makes these chargers so different and efficient? Is it really worth it? Lets find out by going through each stage, one by one.

- See more at: https://www.batterystuff.com/blog/3-stages-of-smart-chargers.html#sthash.BFbRKmQN.dpuf

We've said it, and we'll say it again. The best kind of charger to use on your battery is a 3 stage charger. They are also called "smart chargers" or "micro processor controlled chargers". Basically, these types of chargers are safe, easy to use, and will not overcharge your battery. Almost all of the chargers we sell are 3 stage chargers.

Okay, so it's hard to deny that 3 stage chargers work and they work well. But here's the million dollar question: What are the 3 stages? What makes these chargers so different and efficient? Is it really worth it? Lets find out by going through each stage, one by one.

- See more at: https://www.batterystuff.com/blog/3-stages-of-smart-chargers.html#sthash.BFbRKmQN.dpuf

We've said it, and we'll say it again. The best kind of charger to use on your battery is a 3 stage charger. They are also called "smart chargers" or "micro processor controlled chargers". Basically, these types of chargers are safe, easy to use, and will not overcharge your battery. Almost all of the chargers we sell are 3 stage chargers.

Okay, so it's hard to deny that 3 stage chargers work and they work well. But here's the million dollar question: What are the 3 stages? What makes these chargers so different and efficient? Is it really worth it? Lets find out by going through each stage, one by one.

- See more at: https://www.batterystuff.com/blog/3-stages-of-smart-chargers.html#sthash.BFbRKmQN.dpuf

Hoping for some advice. We are trying to power 24 volt submersible bore pumps that are drawing 4amps and we would like to run them for as long as possible after the sun goes down. We have set up a 24volt solar system with 2 × 100 12 volt panels and 1 × 200 watt 24 volt panel powering 2 × 12 volt deep cycle batteries. We are using a Morningstar controller. This is not running pump for long after the sun goes down. Could you please advise the best number of panels and battery set up (size 100ah) for this application. Thank you